The young man accused of abducting Wisconsin teen Jayme Closs and murdering her parents had a calculated plan and went to extraordinary lengths to avoid getting caught, say prosecutors.

Jake Patterson, 21, allegedly killed the 13-year-old girl’s parents with a shotgun before binding Jayme with tape, loading her into the boot of his sister’s car and hiding her in his house for months.

During her almost 90 days in captivity, she was held under Patterson’s bed for hours at a time and told she would be harmed if she tried to flee, a court document says.

Patterson allegedly told detectives of his meticulous planning in a bid to pull off the “perfect” crime, including shaving his head and using a shotgun that he hoped would be untraceable.

Prosecutors claim Patterson killed Jayme’s parents – James and Denise – and abducted the schoolgirl at the family’s house on his third attempt.

He had abandoned two previous attempts because cars were parked outside the house in Barron, Wisconsin, and lights were on.

Patterson told police he targeted Jayme at random after seeing her board a school bus near her home, and he didn’t know the names of his victims until afterwards as he followed media coverage of the case, according to a criminal complaint.